Coil mounting



Nov. 2 1926.

1,605,302 E. s. TRUE c011. MOUNTING File% an 9 1925 jTUQTZ Ofi EDWIN 6.77506 lr i di F gur 1 a" m leva naa zv er my. lav tes s" lPatentecl Nov.2, 1926.

.UNITED STATES EDWIN S. TRUE, OF OAK PARK, ILLINOIS.

c011. MOUNTING.

Application filed August a, 1923. Serial no. 656,495.

This invention relates to electrical coil structures, such as used forinductances or transformers, and more particularly to such structureswith which a desired amount of inductance may be built up by the use ofa plurality of coils of a standardized width but with graduateddiameters enabling sevoral or the coils to be nested one within another.r

One object of this invention is to provide a method of mounting 'aplurality of electrical coils of the above indicated type, otastandardized maximum width, in amanner such that. any desiredinductance, Within reasonable limits, may be conveniently built up tocomprise a unitary structure.

A further aim of this invention is to provide an adjustable electricalcoil structure, comprising a plurality of ring shaped coils of graduateddiameters nested one within another.

Still another object of this invention is to provide a simple,inexpensive and efiicient clamping means for retaining one ormore ringshaped coils of the type indicated, upon a base member. The clamping orre raining means provided in accordance with this invention is such thata variable number of the coils may be used therewith, or it desired thecoils may be conveniently. interchanged with other coils possessingdifferent inductance values or current carrying capacities.

Other objects of my invention comprise the provision of an electricalcoil structure of the character indicated above, which will be simpleand economical to construct and which will be devoid of complicatedparts and which will accordingly be simple and dependable in operation.

Other objects of my invention will appear trom the following detaileddescription forming a part of this specification and; from the drawingsto which reference may now be had for abetter understanding of the scopeand characteristic features of my invention. y H p v V In t e cc m a y ndrawin sh ve illustrated an; apparatus embodying mvine vention andbywhi'ch my improved'method structure embodying I A V two C011" unitsclamped upon a base;v

Fig. 2 is a vertical: sectional. View: upon the line122*of 1;

I Fig. is a perspective view illustrating the base member, together withclamping straps for retaining the coil units thereon;

Fig. 6 is a perspective view of a yoke member forming a part of theclamping mechanism illustrated in Fig. 1; and,

Fig. 5 is a View similar to Fig. 1, but illustrating the use 01' myinvention for mounting three coil units.

As shown in Fig. 1, the structure may comprisea basemember 10 upon whichmay be mounted a pluralityot ring shaped and nested coil units as at 11and 12. A clampingmechanism 13 as illustrated in Figs. 3 and 4 may serveto retain the-coil units in position upon the base member 10.

The base member 10 is preferably formed of a suitable insulatingmaterial and is shown provided with bindingposts as at it and 1'5, towhich the lead wires of the various coils as 11 and 12 maybe attachedand connected to the desired external circuit.

The base member as shown is provided with a plurality of upstandingflexible metallic strap members, as at 16 and 17 between which thenested coil units may be positioned substantially in a vertical plane.

The strap members 16 and 17 may be fixed to the base member in anysuitable manner. According to the structure here shown, the base memberis provided with a plurality of perforations as at 18 and 19, throughwhich the strap members may be threaded and by means of which thestraps. after being bent intopositi'on, are securely held to the basemember. This particular structure, it will be noted, requires the use ofno additional fastening members and accordingly is very simple andinexpensive. Furthermore, when the coil units are clamped in place, allpossibility of removal or displacement ofthe straps is eliminated;

The upstanding portions of the strap members may be originally formed ofa suitablestandardized lengthto accommodate a l rge mb r. i; c il. U lS-.HQ Q T when the" desired number of coil units has en..- 1 s n or.aersr e c. ss m y, he flexible i pp i e" penise fl the o k. embe s r eda" yo e P ay e n a tivui i in igthsvs m' in g lioo may comprise a"pie'ce ofiileiiible". material,

S rap m m elf i ay e easily cut,

preferably insulation formed in the shape of a channel. The edges of thechannel are adapted to be engaged by the hook portions as at 20 and 21.The relation of these parts when assembled is best shown in Fig. 2.

A clamping means which may comprise a screw 23 is shown extendingtransversely of the channel shaped yoke member 22 and is for the purposeof causing the channel member to buckle downwardly against the interiorsurface of the inner nested coil. The screw 23 upon being tighteneddraws together the edges of the channel member, thus causing the centerportion to bulge downwardly as will readily be understood.

The various nested coil units may be slightly spaced and insulated fromone another, as by strips of insulation, as indicated at 24 and 25.

From the above it will be seen that a very simple form of mounting andclamping structure is provided, which upon the tightening of theclamping screw 23 will securely retain the desired number ofstandardized coil units upon the base member. F urthermore, if it isdesired to interchange any of the various coil units with unitspossessing different electrical characteristics, this may be quicklydone by loosening the clamping screw 23 whereupon the various parts maybe disassembled.

While I have shown and described but one embodiment of my invention, itwill be understood that many modifications may be made therein withoutdeparting from the spirit and scope of the appended claims and I desirethat only such limitations shall be imposed upon my invention as arespecifically pointed out in the claims and such as are required by theprior art.

Having thus described my invention, what I claim as new and desire tosecure by setters Patent in the United States, is:

1. An electrical device comprising a base member, a plurality ofring-shaped coils of graduated diameters adapted to be nested one withinanother and positioned in a perpendicular plane upon said base member, aplurality of flexible metallic straps at either side of. said coils andfixed to said base member, and a yoke member extending between saidstraps, and through said coils, said straps being inwardly anddownwardly bent to form hooks engaging said yoke member, said yokemember retaining said coils in position upon said base.

2. An electrical device comprising a base member, a plurality ofring-shaped 'coils of graduated diameters adapted to be nested onewithin another and positioned in a perpendicular plane upon said basemember,

a plurality of flexible metallic straps at.

either side of said. coils and fixed to said base member, and a yokemember extending between sald straps through said coils, said strapsbeing cut to a length determined by the number of nested coils used andthen bent inwardly and downwardly to form hooks engaging said yokemember, said yoke member retaining said coils in position upon saidbase.

3. An electrical device comprising a base member, a plurality ofring-shaped coils of graduated diameters adapted to be nested one withinanother and positioned in a perside of said coils and fixed to said basemember, a yoke member extending between said straps, said yoke membercomprising a sheet of flexible insulation material of a downwardlyextending arcuate form, and means for causing said yoke to buckledownwardly to clamp said coils to said base.

5. An electrical device comprising base member, a plurality ofring-shaped coils of graduated diameters adapted to be nested one withinanother and positioned in a perpendicular plane upon said base member, aplurality of flexible metallic straps at either side of-said coils andfixed to said base member, a yoke member extending between said strapsand engaged thereby and extending through said coils, said yoke membercomprising a sheet of flexible insulation material of a downwardlyextending arcuate form, and means for causing said yoke to buckledownwardly to clamp said coils to said base, said straps adapted to becut to a length determined by the number of nested coils used and withthe ends bent inwardly and downwardly to form hooks engaging said yokemember.

6. In a device for retaining ringshaped electrical coils, a yoke memberfor extend ing through the coils, means retaining said yoke member andin engagement with ether side thereof, and said yoke member beingprovided with means to cause it to buckle downwardly into firm contactwith the interior surface of the coils.

7. In a device for retaining ring-shaped electrical coils, a yoke memberfor extending through the coils, means retaining said yoke member and inengagement with either side thereof, said yoke member comprising a sheetof flexible material of a downwardly extending arcuate form, and

means for causing said yoke to buckle downwardly against the interiorsurface of the coils.

8. In a device for retaining electrical coils, a yoke member forextending through the coils, said yoke member being composed of a sheetof flexible material of channellike form, means in engagement with theside edges of the channel for retaining said member, and clamping meansextending transversely of said yoke member for causing said member tobuckle against the interior surface of the coils.

9. In a device for retaining electrical coils, a yoke member forextending through the coils, said yoke member being composed of a sheetof flexible insulation material of channel-like form, means inengagement with the side edges of the channel for retaining said member,and clamping means comprising a screw extending transversely of saidyoke member for causing said member to buckle against the interiorsurface of the coils.

10. In a device for retaining electrical coils, a yoke member forextending through the coils, said yoke member being composed of a sheetof flexible material of channellike form, means in engagement with theside edges of the channel for retaining said member, said meanscomprising flexible straps extending along either side of the coils andeach having one end bent inwardly and downwardly in the channel, andclamping means extending transversely of said member for causing saidmember to buckle against the interior surface of the coils.

11. In a device for retaining electrical coils, a base member providedwith perforations, a strap of flexible ductile material threaded throughsaid perforationsv and each end thereof extending upwardly forpositioning the coils therebetween, and clamping means engaging theupper ends of said strap.

12. In a device for retaining a plurality of nested ring-shapedelectrical coils, a base member provided with perforations, a strap offlexible ductile material threaded through said perforations and eachend thereof extending upwardly for positioning the coils therebetween,and yoke means for extension through the coils and engaged at each sideby the upper ends of said strap, said ends being cut to a lengthdetermined by the number of nested coils, and a flexible channel-shapedyoke means for extension through the inner nested coil, said strap endsbeing bent inwardly and downwardly to form hooks engaging the edges ofthe channel.

13. An adjustable electrical coil structure comprising a plurality ofring-shaped coils of graduated diameters nested one within another andremovable clamping means therefor which is adjustable to accommodate anynumber of coils that may be received within the larger coil.

14. An adjustable electrical coil structure comprising a plurality ofring-shaped coils of graduated diameters and uniform width nested onewithin another, one side of each coil resting upon an adjacent innerside of the next succeeding larger coil; and

(ill

removable clamping means for clamping a of the succeeding larger coiland to the.

base.

16. An adjustable electrical coil structure comprising a plurality ofelectrical coils of ring shape with graduated diameters, said coilsbeing nested one within the other and mounted upon a base, and means forclamping said coils together in said nested and spaced arrangement.

17. An electrical coil structure comprising a base, a coil, one or morecoils with graduated diameters nested within said first coil, and meansfor clamping said coils together in spaced relation and to said base.

18. An electrical coil structure comprising a base, a coil, andadjustable clamping means for securing to said base one or more nestedcoils of graduated diameters and within spaced relation of said firstcoil.

19. An electrical coil structure comprising a base, a coil, one or morecoils of graduated diameters nested within the first coil, and clampingmeans for gripping the edges of said coils and securing them in spacedrelation and to the base.

In witness whereof, I have hereunto subscribed my name.

EDWIN S. TRUE.

